The Problem#

Underwater photography sits at the intersection of two hard problems: the physics of light in water, and the reality of being a diver with a camera. Most tools solve one while ignoring the other.

Underwater, simplicity is everything#

A diver is managing buoyancy, air supply, depth, navigation, and buddy awareness — all at once, all the time. Photography has to fit into whatever attention is left. The camera that works underwater is the one that demands the least from the diver.

A phone in a housing gets the form factor right: compact, affordable, always with you. But phone camera apps are designed for land — small touch targets, nested menus, settings that assume you can stop and think. Underwater, wearing thick gloves and breathing from a regulator, you can’t.

The camera interface should disappear. One tap to shoot. No modes to choose, no settings to adjust, no decisions to make while the dive is happening. Capture everything, decide later.

The editing problem#

After the dive, the work begins. Transfer files to a computer. Open each image in Lightroom or Capture One. Set white balance, boost the red channel, pull down blue, fine-tune with HSL sliders, apply local adjustments for the strobe/ambient split. Each image takes minutes. A hundred photos from a single dive becomes a weekend project — and that’s if you know what you’re doing.

Preset-based apps offer a shortcut: one tap, fixed correction. But a preset tuned for tropical blue water produces wrong results in temperate green water. One filter, one depth, one water type — the same limitation as a physical filter, just applied in software. More advanced algorithmic and physics-based methods exist in research, but they haven’t reached a practical tool that a diver can use on their phone.

There’s also a storage problem. Proper color correction needs RAW files — but RAW images are large. On a phone, shooting RAW by default fills up storage fast. Most divers shoot JPEG to save space, which throws away exactly the data that makes correction possible.

What divers actually want is simple: shoot underwater, open the photo, see the colors. No manual editing, no transferring files to a desktop, no presets to choose from.

The color problem#

Water absorbs light selectively — reds first, then oranges, then yellows — leaving only blue-green. It scatters light, reducing contrast and sharpness. And it does both differently in every body of water. The degradation is real, physical, and unavoidable. No camera setting prevents it.

But it’s also predictable. The physics has structure — exponential decay, wavelength-dependent absorption, depth-varying backscatter. The transformation water applies to light can be modeled, and if it can be modeled, it can be inverted. That’s what makes computational correction possible: the damage isn’t random, it follows rules.

That’s what ScubAI is for. An iPhone app that captures RAW underwater, analyzes each image’s conditions, and applies physics-based correction automatically — no strobes, no filters, no Lightroom. The solution.